some figures:
On a set of 2806 matches:
1144 (41%) are season 3 vs season 3. 67 (5,8%) among them are turn 0 crashes
1498 (53%) are season 4 vs season 4. 23 (1,5%) among them are turn 0 crashes
164 (6%) are season 3 vs season 4. 56 (34%) among them are turn 0 crashes